GB770523A - Improvements in or relating to alternating current circuit arrangements employing transistors - Google Patents

Improvements in or relating to alternating current circuit arrangements employing transistors

Info

Publication number
GB770523A
GB770523A GB3575553A GB3575553A GB770523A GB 770523 A GB770523 A GB 770523A GB 3575553 A GB3575553 A GB 3575553A GB 3575553 A GB3575553 A GB 3575553A GB 770523 A GB770523 A GB 770523A
Authority
GB
United Kingdom
Prior art keywords
circuit
impedance
base
transistor
reactive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3575553A
Inventor
Eric Wolfendale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE534312D priority Critical patent/BE534312A/xx
Application filed by Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB3575553A priority patent/GB770523A/en
Publication of GB770523A publication Critical patent/GB770523A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
    • H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
    • H03B7/06—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being semiconductor device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • H03B5/362—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier being a single transistor

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

770,523. Transistor negative impedance amplifying and oscillating circuits; frequency modulation. MULLARD RADIO VALVE CO., Ltd. Nov. 5, 1954 [Dec. 23, 1953; Jan. 11, 1954], Nos. 35755/53 and 808/54. Classes 40(5) and 40(6) In a junction transistor circuit a reactive impedance is arranged in the emittercollector circuit which together with the phase shift occurring between the base and emitter currents makes the total exceed ninety degrees so that a negative resistance component appears in the base input impedance. An oscillator may be produced by employing an inductor L in the base lead', Fig. 1 (first Provisional Specification) the resistor RE and capacitor C forming the reactive impedance. Frequency modulation may be affected by varying the collector potential. The oscillator may be stabilized by a crystal X or series tuned circuit, Fig. 1 (second Provisional Specification) the reactive load being the circuit CE LE which is adjusted to be capacitive at the operating frequency. Amplification of signals from a source G, Fig. 6, feeding a load RL may be obtained by interposing a negative impedance circuit comprising a transistor with base impedance L and emitter reactive load REC, Rb serving as a base bias resistor, and Cb as a blocking capacitor. The resistor RL may be replaced by a transmission line, so that amplification takes place equally in both directions. The emitter circuit may be formed by a parallel circuit tuned to be capacitive at the operating frequency. According to the first Provisional Specification a point contact transistor may be employed and pulses generated by including an inductor in the collector lead shunted by a diode.
GB3575553A 1953-12-23 1953-12-23 Improvements in or relating to alternating current circuit arrangements employing transistors Expired GB770523A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE534312D BE534312A (en) 1953-12-23
GB3575553A GB770523A (en) 1953-12-23 1953-12-23 Improvements in or relating to alternating current circuit arrangements employing transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3575553A GB770523A (en) 1953-12-23 1953-12-23 Improvements in or relating to alternating current circuit arrangements employing transistors

Publications (1)

Publication Number Publication Date
GB770523A true GB770523A (en) 1957-03-20

Family

ID=10381220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3575553A Expired GB770523A (en) 1953-12-23 1953-12-23 Improvements in or relating to alternating current circuit arrangements employing transistors

Country Status (2)

Country Link
BE (1) BE534312A (en)
GB (1) GB770523A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0535883A1 (en) * 1991-09-30 1993-04-07 Motorola, Inc. Voltage controlled oscillator employing negative resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0535883A1 (en) * 1991-09-30 1993-04-07 Motorola, Inc. Voltage controlled oscillator employing negative resistance

Also Published As

Publication number Publication date
BE534312A (en)

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